U+1D781 "𝞁" Mathematical Sans-Serif Bold Small Final Sigma Unicode Character

U+1D781 "𝞁" Mathematical Sans-Serif Bold Small Final Sigma is a typographic glyph belonging to the Mathematical Alphanumeric Symbols block, designed for use in mathematical notation where a bold, sans-serif variant of the Greek final sigma (used at the end of a word) is needed. This character allows authors and typesetters to distinguish mathematical variables from regular text, particularly in fields such as physics or algebra where different styles convey specific semantic roles. It is encoded separately from the standard Greek final sigma (U+03C2) to preserve font and style distinctions in plain text environments that support Unicode.